Posting an article

As a writer, I'd like to be able to post an article and to see the results on the page to be able to see my work as other would see it

Acceptance Criteria:

• On the main page user should see a Write Article button after log in (nothing else should be shown on that page and not logged in use can see just an empty page)
• After pressing the Write Article button, user should see an editor with the ability to use BB codes like in JCommune (if there are other formats available in RoR as a plugin out of box, we might consider them instead of BB codes)
• After creating an article, user presses Post Article and is redirected to the page where he can view it (http://uat.jtalks.org/antarcticle/article/123)